Compact $sssc\bar{c}$ pentaquark states predicted by a quark model

Abstract

Several compact $sssc\bar{c}$ pentaquark resonances are predicted in a potential quark model. The Hamiltonian is the best available one, which reproduces the masses of the low-lying charmed and strange hadrons well. Full five-body calculations are carried out by the use of the Gaussian expansion method, and the relevant baryon-meson thresholds are taken into account explicitly. Employing the real scaling method, we predict four sharp resonances, $J^P=1/2^{-}$ ($E=5180$ MeV, $\Gamma =20$ MeV), $5/2^{-}$ (5645 MeV, 30 MeV), $5/2^{-}$ (5670 MeV, 50 MeV), and $1/2^{+}$ (5360 MeV, 80 MeV). These are the candidates of compact pentaquark resonance states from the current best quark model, which should be confirmed either by experiments or lattice QCD calculations.

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